Diff: CDROM - Waikato Linux Users Group

Differences between version 11 and predecessor to the previous major change of CDROM.

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Newer page:	version 11	Last edited on Tuesday, August 3, 2004 1:28:12 pm	by AristotlePagaltzis	Revert
Older page:	version 9	Last edited on Thursday, June 3, 2004 9:42:07 pm	by AristotlePagaltzis	Revert

@@ -1,13 +1,19 @@

[Acronym] for __C__ompact __D__isc - __R__ead __O__nly __M__emory (see DiskVsDisc)

-Standard discs hold 650[MB] or there abouts. The normal filesystem used on a [CDROM] data track is [ISO]9660.

+Standard discs hold 650[MB] or there abouts. The normal filesystem used on a [CDROM] data track is [ISO]9660. Hence the common use of "[ISO]" to refer to disc images and of the extension <tt>.iso</tt> for their filename.

+

+Images can be created using mkisofs(8) and inspected using isoinfo(8) or isodump(8). Alternatively, you can mount an [ISO] like a regular device using the [Kernel]'s loopback support (but note that this requires SuperUser privileges):''''

+

+ <verbatim>

+ mount /path/to/image.iso /mnt/iso -o loop

+ </verbatim>

There are two competing standards to allow longer filenames and a few other things [ISO]9660 does not provide. The earlier one, originating from the [Unix] environment, is called Rock Ridge. The other one, made up my MicrosoftCorporation, is called Joliet. (Note that some characters that are valid on [Unix] FileSystems are not allowed on Joliet discs.)

-For reading audio discs or writing CDs, you need access to the [CDROM] drive raw device. Under a [Linux] OperatingSystem, these are called __ /dev/hd''x''__ for [IDE] drives and __ /dev/scd''n''__ for [SCSI] drives. Under [FreeBSD] 5 and later, they're called __ /dev/acd''n''__ for [IDE] drives and ''??? (AddToMe)'' for [SCSI] drives.

+For reading audio discs or writing CDs, you need access to the [CDROM] drive raw device. Under a [Linux] OperatingSystem, these are called <tt> /dev/hd''x''</tt> for [IDE] drives and <tt> /dev/scd''n''</tt> for [SCSI] drives. Under [FreeBSD] 5 and later, they're called <tt> /dev/acd''n''</tt> for [IDE] drives and ''??? (AddToMe)'' for [SCSI] drives.